基于数值模拟改善45钢中间裂纹的连铸工艺优化  

Based on numerical simulation to improve 45 steel intermediate crack of continuous casting process optimization

作　　者：夏鹏程 吴华杰 安航航 蔡守桂 丁振涛 XIA Pengcheng;WU Huajie;AN Hanghang;CAI Shougui;DING Zhentao(Collaborative Innovation Center for Steel Common Technology,University of Science and Technology Beijing,Beijing 100083,China;Changshu Longteng Special Steel Co.,Ltd.,Changshu 215500,Jiangsu,China)

机构地区：[1]北京科技大学钢铁共性技术协同创新中心,北京100083 [2]常熟市龙腾特种钢有限公司,江苏常熟215500

出　　处：《连铸》2023年第6期55-61,共7页Continuous Casting

摘　　要：针对45钢小方坯的中间裂纹问题,依托有限元仿真技术建立凝固传热和凝固组织模型,采用数值模拟和工业试验相结合的方法,对小方坯中间裂纹进行改善。结果表明,在拉速为1.8 m/min、过热度为30℃、二冷比水量为0.50 L/kg、各段足辊区和二冷一区至四区的分配比为40%-25%-20%-12%-3%条件下,经工业试验验证,45钢小方坯中间裂纹问题得到明显改善。Aiming at the intermediate crack problem of 45 steel billet, the solidification heat transfer and solidification structure model were established by the finite element simulation technology, and the numerical simulation and industrial test were combined to improve the intermediate crack of the billet. The results show that under the conditions of pulling speed of 1.8 m/min, superheat of 30 ℃, specific water of secondary cooling of 0.50 L/kg, and distribution ratio of each foot roll zone and secondary cooling zone 1 to 4 zone of 40%-25%-20%-12%-3%, the middle crack problem of 45 steel billet is obviously improved by industrial tests.

关 键 词：小方坯 45钢 中间裂纹 数值模拟 

分 类 号：TF777[冶金工程—钢铁冶金]